| /*************************************************************************** |
| * _ _ ____ _ |
| * Project ___| | | | _ \| | |
| * / __| | | | |_) | | |
| * | (__| |_| | _ <| |___ |
| * \___|\___/|_| \_\_____| |
| * |
| * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al. |
| * |
| * This software is licensed as described in the file COPYING, which |
| * you should have received as part of this distribution. The terms |
| * are also available at https://curl.se/docs/copyright.html. |
| * |
| * You may opt to use, copy, modify, merge, publish, distribute and/or sell |
| * copies of the Software, and permit persons to whom the Software is |
| * furnished to do so, under the terms of the COPYING file. |
| * |
| * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY |
| * KIND, either express or implied. |
| * |
| * SPDX-License-Identifier: curl |
| * |
| ***************************************************************************/ |
| /* <DESC> |
| * Extract headers post transfer with the header API |
| * </DESC> |
| */ |
| #include <stdio.h> |
| #include <curl/curl.h> |
| |
| static size_t write_cb(char *data, size_t n, size_t l, void *userp) |
| { |
| /* take care of the data here, ignored in this example */ |
| (void)data; |
| (void)userp; |
| return n*l; |
| } |
| |
| int main(void) |
| { |
| CURL *curl; |
| |
| curl = curl_easy_init(); |
| if(curl) { |
| CURLcode res; |
| struct curl_header *header; |
| curl_easy_setopt(curl, CURLOPT_URL, "https://example.com"); |
| /* example.com is redirected, so we tell libcurl to follow redirection */ |
| curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1L); |
| |
| /* this example just ignores the content */ |
| curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_cb); |
| |
| /* Perform the request, res will get the return code */ |
| res = curl_easy_perform(curl); |
| /* Check for errors */ |
| if(res != CURLE_OK) |
| fprintf(stderr, "curl_easy_perform() failed: %s\n", |
| curl_easy_strerror(res)); |
| |
| if(CURLHE_OK == curl_easy_header(curl, "Content-Type", 0, CURLH_HEADER, |
| -1, &header)) |
| printf("Got content-type: %s\n", header->value); |
| |
| printf("All server headers:\n"); |
| { |
| struct curl_header *h; |
| struct curl_header *prev = NULL; |
| do { |
| h = curl_easy_nextheader(curl, CURLH_HEADER, -1, prev); |
| if(h) |
| printf(" %s: %s (%u)\n", h->name, h->value, (int)h->amount); |
| prev = h; |
| } while(h); |
| |
| } |
| /* always cleanup */ |
| curl_easy_cleanup(curl); |
| } |
| return 0; |
| } |